Roelof,

Tinama reference is TM043NBH02.
I try also a New Haven display but tianma has better viewing angles.
I will receive today a devlopment kit from embedded artist with LPC4357
+ 4.3" tft display. So I will try the "single chip" solution.

Sebastien
Le 26/10/2012 11:39, roelof 't Hooft a écrit :
> On Thu, 2012-10-25 at 08:47 +0200, Sebastien Jacquemard wrote:
> > I use a Tianma display
> > with integrated resistive touchscreen at less than 20EUR / 200 parts
> >
> > (the Tianma is interesting because it use a single 30 pin connector for
> > display signals, touchscreen and led backlight. Also it use a single
> > 3.3v power supply and 3.3v signal)
>
> Hi Sebastien,
>
> Can you please send me the type number of the tianma display ?
>
> thanks,
>
> roelof
>
>

An Engineer's Guide to the LPC2100 Series

On Fri, 2012-10-26 at 10:54 +0100, Bernardo Marques wrote:
> Newhaven Display (http://www.newhavendisplay.com/tfts-c-1.html) also has
> some interesting options around 20 a pice. I'm using one of theirs 4.3''
> TFTs with only 3V3 power supply and signals (some other voltage for
> backlight) and a single 40 pin FPC connector.
> You can find them at mouser with the 4.3'' priced a little above 20 per
> unit.

Bernardo,

Thank you, I'll have a look.

roelof

Newhaven Display (http://www.newhavendisplay.com/tfts-c-1.html) also has
some interesting options around 20 a pice. I'm using one of theirs 4.3''
TFTs with only 3V3 power supply and signals (some other voltage for
backlight) and a single 40 pin FPC connector.
You can find them at mouser with the 4.3'' priced a little above 20 per
unit.

Regards,
Bernardo Marques.
On Fri, Oct 26, 2012 at 10:39 AM, roelof 't Hooft wrote:

> **
> On Thu, 2012-10-25 at 08:47 +0200, Sebastien Jacquemard wrote:
> > I use a Tianma display
> > with integrated resistive touchscreen at less than 20EUR / 200 parts
> >
> > (the Tianma is interesting because it use a single 30 pin connector for
> > display signals, touchscreen and led backlight. Also it use a single
> > 3.3v power supply and 3.3v signal)
>
> Hi Sebastien,
>
> Can you please send me the type number of the tianma display ?
>
> thanks,
>
> roelof
>
>
>

On Thu, 2012-10-25 at 08:47 +0200, Sebastien Jacquemard wrote:
> I use a Tianma display
> with integrated resistive touchscreen at less than 20EUR / 200 parts
>
> (the Tianma is interesting because it use a single 30 pin connector for
> display signals, touchscreen and led backlight. Also it use a single
> 3.3v power supply and 3.3v signal)

Hi Sebastien,

Can you please send me the type number of the tianma display ?

thanks,

roelof

@Don,
I purchased both screen at a french company called "Eurocomposant" :
www.eurocomposant.fr
For 7" I use a "Primeview" display with integrated resistive touchscreen
at around 60EUR for 100 parts and for the 4.3", I use a Tianma display
with integrated resistive touchscreen at less than 20EUR / 200 parts

(the Tianma is interesting because it use a single 30 pin connector for
display signals, touchscreen and led backlight. Also it use a single
3.3v power supply and 3.3v signal)
I use in the past Sharp 4.3" but it has 2.5v signals (so you need a
74ALVC164245 chip to translate levels and a second small 4 pin connector
for backlight who's difficult to find).

For both I use a AR1001 touchscreen SPI controller from microchip who
works very nice.

Le 24/10/2012 17:40, Donald H a rit :
>
> --- In l... ,
> "sebfr74" wrote:
>
> > I've got a working product using a LPC2478 + SDRAM + 7" TFT display
> (8 bits colors).
> > We use now a 4.3" display (480*272 = 130560 kbyte of RAM in 8 bit depth.
>
> Please post where you purchased these 7" and 4.3" displays ?
>
> Thanks
>
> don
>
>

--- In l..., "sebfr74" wrote:

> I've got a working product using a LPC2478 + SDRAM + 7" TFT display (8 bits colors).
> We use now a 4.3" display (480*272 = 130560 kbyte of RAM in 8 bit depth.

Please post where you purchased these 7" and 4.3" displays ?

Thanks

don

--- In l..., "basicnode" wrote:
>
> You other alternative is to use a newer part, I've used the LPC18xx and LPC43xx parts driving the LCD from internal RAM. I believe the LPC178x is also capable of doing the same.
>

LPC178x is only capable to access peripheral RAM and external RAM. But it's a good idea, I will change it for a LPC4357 (it will remove SDRAM and EEprom form my actual board).

Sebastien

You other alternative is to use a newer part, I've used the LPC18xx and LPC43xx parts driving the LCD from internal RAM. I believe the LPC178x is also capable of doing the same.

How have you connected the unused colour bits from the display?

--
Tim Mitchell

Thanks for your help, I will keep the external SDRAM if I have no other choices...

Sebastien

--- In l..., "Kevin" wrote:
>
> The LCD interface is indeed incapable of accessing the main 64k ram or the 16k ethernet ram on AHB2.
> As the user manual (UM10237 ch12.6.1) indicates: "The LCD DMA controller can only access the 10 kB SRAM on AHB1 and the external memory."
>
> And I now see that there is a small error in that one line of text, it should be 16kb.
>
> --
> Kevin
>
>
>
> --- In l..., "Paul Curtis" wrote:
> >
> > Hi,
> >
> > > I've got a working product using a LPC2478 + SDRAM + 7" TFT display (8
> > > bits colors).
> > > Now I've got a new project with same LPC2478 but for cost reason we would
> > > like to use the internal RAM for the LCD :
> > >
> > > We use now a 4.3" display (480*272 = 130560 kbyte of RAM in 8 bit depth.
> > > The idea is to use 4 bit / pixel (it's enough for this product).
> > >
> > > I keep the same project changing only the LCD parameters (width , height
> > > pulse width ....) and the memory adress (0xA0000000 for sdram and
> > > 0x40000000 for 64kbyte internal sram.
> > >
> > > For variables... I use 16kb sram at adress 0x7FE00000.
> >
> > I do not believe the LCD controller has AHB or APB access to the 64K SRAM of
> > the CPU. Datasheet section 7.3 indicates the 64K of RAM is for exclusive
> > use by the CPU.
> >
> > Regards,
> >
> > --
> > Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk
> > SolderCore Development Platform http://www.soldercore.com
>